Fix query error after insert an all null aligned tablet and flush (apache#14777)

Author: HTHou

integration-test/src/test/java/org/apache/iotdb/session/it/IoTDBSessionInsertNullIT.java

@@ -32,6 +32,8 @@
 import org.apache.tsfile.file.metadata.enums.TSEncoding;
 import org.apache.tsfile.read.common.Field;
 import org.apache.tsfile.read.common.RowRecord;
+import org.apache.tsfile.write.record.Tablet;
+import org.apache.tsfile.write.schema.MeasurementSchema;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -355,4 +357,72 @@ public void insertAlignedRecordsOfOneDeviceNullTest() {
       fail(e.getMessage());
     }
   }
+
+  @Test
+  public void insertTabletNullTest() {
+    try (ISession session = EnvFactory.getEnv().getSessionConnection()) {
+      prepareData(session);
+
+      String deviceId = "root.sg1.clsu.d1";
+      Tablet tablet =
+          new Tablet(
+              deviceId,
+              Arrays.asList(
+                  new MeasurementSchema("s1", TSDataType.BOOLEAN),
+                  new MeasurementSchema("s2", TSDataType.INT32)),
+              3);
+      tablet.addTimestamp(0, 300);
+      tablet.addValue("s1", 0, null);
+      tablet.addValue("s2", 0, null);
+      tablet.addTimestamp(1, 400);
+      tablet.addValue("s1", 1, null);
+      tablet.addValue("s2", 1, null);
+      tablet.addTimestamp(2, 500);
+      tablet.addValue("s1", 2, null);
+      tablet.addValue("s2", 2, null);
+      session.insertTablet(tablet);
+      long nums = queryCountRecords(session, "select count(s1) from " + deviceId);
+      assertEquals(0, nums);
+      session.executeNonQueryStatement("flush");
+      nums = queryCountRecords(session, "select count(s1) from " + deviceId);
+      assertEquals(0, nums);
+    } catch (Exception e) {
+      e.printStackTrace();
+      fail(e.getMessage());
+    }
+  }
+
+  @Test
+  public void insertAlignedTabletNullTest() {
+    try (ISession session = EnvFactory.getEnv().getSessionConnection()) {
+      prepareData(session);
+
+      String deviceId = "root.sg1.clsu.aligned_d1";
+      Tablet tablet =
+          new Tablet(
+              deviceId,
+              Arrays.asList(
+                  new MeasurementSchema("s1", TSDataType.BOOLEAN),
+                  new MeasurementSchema("s2", TSDataType.INT32)),
+              3);
+      tablet.addTimestamp(0, 300);
+      tablet.addValue("s1", 0, null);
+      tablet.addValue("s2", 0, null);
+      tablet.addTimestamp(1, 400);
+      tablet.addValue("s1", 1, null);
+      tablet.addValue("s2", 1, null);
+      tablet.addTimestamp(2, 500);
+      tablet.addValue("s1", 2, null);
+      tablet.addValue("s2", 2, null);
+      session.insertAlignedTablet(tablet);
+      long nums = queryCountRecords(session, "select count(s1) from " + deviceId);
+      assertEquals(0, nums);
+      session.executeNonQueryStatement("flush");
+      nums = queryCountRecords(session, "select count(s1) from " + deviceId);
+      assertEquals(0, nums);
+    } catch (Exception e) {
+      e.printStackTrace();
+      fail(e.getMessage());
+    }
+  }
 }

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/flush/MemTableFlushTask.java

@@ -138,7 +138,7 @@ public void syncFlushMemTable() throws ExecutionException, InterruptedException
     for (IDeviceID deviceID : deviceIDList) {
       final Map<String, IWritableMemChunk> value = memTableMap.get(deviceID).getMemChunkMap();
       // skip the empty device/chunk group
-      if (memTableMap.get(deviceID).count() == 0 || value.isEmpty()) {
+      if (memTableMap.get(deviceID).isEmpty() || value.isEmpty()) {
         continue;
       }
       encodingTaskQueue.put(new StartFlushGroupIOTask(deviceID));

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/memtable/AlignedWritableMemChunk.java

@@ -264,6 +264,9 @@ public IMeasurementSchema getSchema() {
 
   @Override
   public long getMaxTime() {
+    if (isEmpty()) {
+      return Long.MIN_VALUE;
+    }
     return list.getMaxTime();
   }
 
@@ -511,7 +514,15 @@ public long getLastPoint() {
 
   @Override
   public boolean isEmpty() {
-    return list.rowCount() == 0 || measurementIndexMap.isEmpty();
+    if (list.rowCount() == 0) {
+      return true;
+    }
+    if (ignoreAllNullRows) {
+      return measurementIndexMap.isEmpty()
+          || (list.getAllValueColDeletedMap() != null
+              && list.getAllValueColDeletedMap().isAllMarked());
+    }
+    return false;
   }
 
   @Override

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/memtable/WritableMemChunkGroup.java

@@ -118,7 +118,7 @@ public Map<String, IWritableMemChunk> getMemChunkMap() {
 
   @Override
   public boolean isEmpty() {
-    return memChunkMap.isEmpty();
+    return memChunkMap.isEmpty() || count() == 0;
   }
 
   @Override